Jacqueline Durran The Green Dress In Atonement When We Started Making The Movie, We All Knew It Was A Pivotal Anyone else still thinking about Keira Knightley's backless green dress from Atonement, 13 years later? At the link in bio, our style editor examines why the backless trend became an unlikely Keira Knightleys green dress in Atonement (2008) was designed to embody desire, elegance, and envy. Flowing and sultry, it enhanced the passion of the library scene while its striking shade of Atonement' 10th anniversary: The inside story on that iconic green dress 98 6. Keira Knightley green dress from 'Atonement' movie f Flickr